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2003 Lincoln Navigator error code P0320 stutters and stalls getting worse. Sometimes the truck will bog down and does not respond to the throttle. (Press the gas and no response) Already tried: new TPS, crank position sensor, idle air control valve.

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Please check voltage at the crank sensor with key turned on. Should be at least 4.5 volts. Also check tone ring at sensor. rotate engine to observe all teeth. There should be one tooth missing and no chipped teeth, debris, or other issue that could corrupt the signal. Backprobe the signal wire and measure the signal with your voltmeter set to AC. The AC voltage should increase with engine RPM.
Sorry, but I cannot find the wiring diagram for the crank sensor. If possible and especially if the reference voltage at the sensor connector is wrong, trace the sensor wires back to the PCM to see if there is an open or short in the wiring. Please let me know what you find out.

Posted on Mar 31, 2011

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Ignition/distrib engine speed input circuit malfunction

Posted on Mar 31, 2011


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I doubt you have cam sensor issues.
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